<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Insert title here</title>
<style type="text/css">

</style>
<script type="text/javascript">
function selectInput()
{		
		var form = document.getElementById("forma");
		var input = form.getElementsByTagName("input");
		
		for (var i=0; i<input.length; i++)
		{
				if (input[i].type == "text")
				{
						 if (input[i].value.indexOf("@")==-1)
						 {	
							 			 
							 alert("Values are not text");
							 return false;

							 }
				} 
			
		}
		return true;
}
</script>
</head>
<body>
<form action="" id="forma" onsubmit="return selectInput();">
<table>
	<tr>
		<td><input type="text" value="-" />
		</td>
		<td><input type="text" value="-" />
		</td>
		<td><input type="text" value="-" />
		</td>
		<td><input type="text" value="-" />
		</td>
	</tr>
	<tr>
		<td><input value="Submit" type="submit" /></td>
		<td><input value="Reset" type="reset" /></td>
	</tr>
</table>
</form>
</body>
</html>